[volt-nuts] PCBs with ceramic substrates

Poul-Henning Kamp phk at phk.freebsd.dk
Thu Apr 6 01:47:18 EDT 2017

In message <20170406063848.2bac84ef9bec7c9c55694bbc at kinali.ch>, Attila Kinali w

>I recently wondered, why people around voltage metrology hardly
>talk about ceramic substrates (Al2O3, AlN, ...) for PCBs.
>They have surface resistivity that is as high as PTFE, have
>higher thermal conductivity, lower thermal expansion (AlN is
>even pretty close to Si). So, why then does it hardly ever get
>mentioned? Is it the cost of those? Or is there something I am

I would worry about piezoelectricity ?

Also, most ceramics have hideous thermal expansions...

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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